Main Features:Â
1. Wide verizon LCD
2. Protection to following situations:
over voltage,  over current,  overloading and thunderstrike
3. Screen flip function
4. Shortcut to switch group,  user,  and talking history
5. Loud audio and audio control lock function
6. Multimedia Speaker to ensure audio qualityÂ
7.Wide range of input voltage options: 12-28V
8. Can be a 5V 1A quick charger for mobile phone
9. 8-pin secondary development jack available to other APPs like oil consumptionÂ
10. Maximum bracket rotate degree: 270 degree
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Application:Â
Unique for:Taxi/Bus, Transporting company, Logistics
Popular for:Security, Railway, Army, Government, Rescue, Police,Travelling, etc.
 Main Function : SOSÂ
Q: What is HOT Mic Mode for SOS on TM-990Â 4G Mobile Two Way Radio
A:Hot Mic Mode opens the Tx. for 10 seconds when the SOS alert is triggered